What is the percentage for one leg in the Rule of Nines for an adult?

What is the percentage for one leg in the Rule of Nines for an adult?

• A. 9%
• B. 18%
• C. 13%
• D. 27%

Answer: (B)

In the Rule of Nines for adults, the body is divided into sections that are multiples of 9% to estimate burn size quickly. The legs together account for 36% of the total body surface area, so one leg is half of that, which is 18%. This estimate helps guide initial fluid resuscitation and treatment planning. For context, each arm is 9%, the head is 9%, the trunk is 36% (18% front and 18% back), and the perineum is 1%. Note this is an approximation and less precise for children, whose proportions differ.

In the Rule of Nines for adults, the body is divided into sections that are multiples of 9% to estimate burn size quickly. The legs together account for 36% of the total body surface area, so one leg is half of that, which is 18%. This estimate helps guide initial fluid resuscitation and treatment planning. For context, each arm is 9%, the head is 9%, the trunk is 36% (18% front and 18% back), and the perineum is 1%. Note this is an approximation and less precise for children, whose proportions differ.